[8630] | 1 | #region License Information
|
---|
| 2 | /* HeuristicLab
|
---|
[16057] | 3 | * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
|
---|
[8630] | 4 | *
|
---|
| 5 | * This file is part of HeuristicLab.
|
---|
| 6 | *
|
---|
| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
|
---|
| 8 | * it under the terms of the GNU General Public License as published by
|
---|
| 9 | * the Free Software Foundation, either version 3 of the License, or
|
---|
| 10 | * (at your option) any later version.
|
---|
| 11 | *
|
---|
| 12 | * HeuristicLab is distributed in the hope that it will be useful,
|
---|
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
| 15 | * GNU General Public License for more details.
|
---|
| 16 | *
|
---|
| 17 | * You should have received a copy of the GNU General Public License
|
---|
| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
|
---|
| 19 | */
|
---|
| 20 | #endregion
|
---|
| 21 |
|
---|
| 22 | using System;
|
---|
| 23 | using HeuristicLab.Common;
|
---|
| 24 | using HeuristicLab.Core;
|
---|
| 25 | using HeuristicLab.Data;
|
---|
| 26 |
|
---|
| 27 | namespace HeuristicLab.Optimization.Operators {
|
---|
| 28 | /// <summary>
|
---|
| 29 | /// An item that performs similarity calculation between two solutions.
|
---|
| 30 | /// </summary>
|
---|
| 31 | /// <remarks>
|
---|
| 32 | /// The item always considers two solutions to be equal if they have the same quality.
|
---|
| 33 | /// </remarks>
|
---|
| 34 | [Item("QualitySimilarityCalculator", "An item that performs similarity calculation between two solutions. The item only considers the qualities of the two solutions.")]
|
---|
| 35 | public sealed class QualitySimilarityCalculator : SingleObjectiveSolutionSimilarityCalculator {
|
---|
[12070] | 36 | protected override bool IsCommutative { get { return true; } }
|
---|
| 37 |
|
---|
[8630] | 38 | private QualitySimilarityCalculator(bool deserializing) : base(deserializing) { }
|
---|
| 39 | private QualitySimilarityCalculator(QualitySimilarityCalculator original, Cloner cloner) : base(original, cloner) { }
|
---|
| 40 | public QualitySimilarityCalculator() : base() { }
|
---|
| 41 |
|
---|
| 42 | public override IDeepCloneable Clone(Cloner cloner) {
|
---|
| 43 | return new QualitySimilarityCalculator(this, cloner);
|
---|
| 44 | }
|
---|
| 45 |
|
---|
| 46 | public static double CalculateSimilarity(IScope left, IScope right, string qualityVariableName) {
|
---|
| 47 | double leftQuality = ((DoubleValue)left.Variables[qualityVariableName].Value).Value;
|
---|
| 48 | double rightQuality = ((DoubleValue)right.Variables[qualityVariableName].Value).Value;
|
---|
| 49 | double delta = leftQuality.IsAlmost(rightQuality) ? 0.0 : Math.Abs(leftQuality - rightQuality);
|
---|
| 50 | return 1.0 - delta / Math.Max(leftQuality, rightQuality);
|
---|
| 51 | }
|
---|
| 52 |
|
---|
| 53 | public override double CalculateSolutionSimilarity(IScope leftSolution, IScope rightSolution) {
|
---|
| 54 | return CalculateSimilarity(leftSolution, rightSolution, QualityVariableName);
|
---|
| 55 | }
|
---|
| 56 | }
|
---|
| 57 | } |
---|